Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/exports/LegendProcessor.java @ 7597:fca46ce8e4f5

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(issue1225) Implement Magic labels. There is now a new value in the chartsettings "Suggested Label" which is hidden in the property editor. A suggested label is the label that combines the label's of all processors that wrote data to an axis. This suggested label is set as the label when the user has not overwritten the label.
author Andre Heinecke <aheinecke@intevation.de>
date Mon, 25 Nov 2013 14:58:14 +0100
parents fe32a7f9655e
children 5e38e2924c07
rev   line source
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4897a58c8746 River artifacts: Added new copyright headers.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 5838
diff changeset
1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
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Sascha L. Teichmann <teichmann@intevation.de>
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU AGPL (>=v3)
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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6 * documentation coming with Dive4Elements River for details.
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7 */
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8
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9 package org.dive4elements.river.exports;
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10
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11 import java.awt.geom.Line2D;
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12 import java.util.ArrayList;
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13 import java.util.HashMap;
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14 import java.util.Iterator;
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15 import java.util.LinkedHashMap;
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16 import java.util.List;
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17
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18 import org.jfree.chart.LegendItem;
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19 import org.jfree.chart.LegendItemCollection;
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20 import org.jfree.chart.plot.XYPlot;
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21
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22
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23 /** Class to process Plots legends. */
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24 public abstract class LegendProcessor {
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25
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26 /** (Empty) shape for aggregated Legend Items. */
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27 private static final Line2D.Double SPACE = new Line2D.Double(0,0,0,0);
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28
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29
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30 /** Prevent instantiations. */
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31 private LegendProcessor() {
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32 }
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33
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34
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35 /**
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36 * Create a hash from a legenditem.
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37 * This hash can then be used to merge legend items labels.
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38 * @return hash for given legenditem to identify mergeables.
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39 */
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40 protected static String legendItemHash(LegendItem li) {
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41 // TODO Do proper implementation. Ensure that only mergable sets are created.
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42 // getFillPaint()
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43 // getFillPaintTransformer()
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44 // getLabel()
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45 // getLine()
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46 // getLinePaint()
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47 // getLineStroke()
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48 // getOutminePaint()
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49 // getOutlineStroke()
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50 // Shape getShape()
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51 // String getToolTipText()
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52 // String getURLText()
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53 // boolean isLineVisible()
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54 // boolean isShapeFilled()
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55 // boolean isShapeOutlineVisible()
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56 // boolean isShapeVisible()
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57 String hash = li.getLinePaint().toString();
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58 // XXX: DEAD CODE // String label = li.getLabel();
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59 /*if (label.startsWith("W (") || label.startsWith("W(")) {
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60 hash += "-W-";
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61 }
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62 else if (label.startsWith("Q(") || label.startsWith("Q (")) {
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63 hash += "-Q-";
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64 }*/
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65
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66 // WQ.java holds example of using regex Matcher/Pattern.
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67
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68 return hash;
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69 }
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70
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71
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72 /**
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73 * Create new legend entries, dependent on settings.
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74 * @param plot The plot for which to modify the legend.
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75 * @param threshold How many items are needed for aggregation to
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76 * be triggered?
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77 */
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78 public static void aggregateLegendEntries(XYPlot plot, int threshold) {
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79 LegendItemCollection old = plot.getLegendItems();
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80 // Find "similar" entries if aggregation is enabled.
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81
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82 int maxListSize = 0;
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83 int AGGR_THRESHOLD = threshold;
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84
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85 if (AGGR_THRESHOLD > old.getItemCount() || AGGR_THRESHOLD <= 0){
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86 return;
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87 }
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88
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89 HashMap<String, List<LegendItem>> entries = new LinkedHashMap<String, List<LegendItem>>();
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90 for (Iterator<LegendItem> i = old.iterator(); i.hasNext();) {
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91 LegendItem item = i.next();
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92 String hash = legendItemHash(item);
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93 List<LegendItem> itemList = entries.get(hash);
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94 if (itemList == null) {
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95 itemList = new ArrayList<LegendItem>();
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96 entries.put(hash, itemList);
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97 }
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98 itemList.add(item);
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99
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100 if (itemList.size() > maxListSize) {
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101 maxListSize = itemList.size();
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102 }
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103 }
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104
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105 if (maxListSize < AGGR_THRESHOLD) {
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106 // No need to do anything.
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107 return;
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108 }
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109
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110 // Run over collected entries, merge their names and create new
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111 // entry if needed.
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112 LegendItemCollection newLegend = new LegendItemCollection();
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113 for (List<LegendItem> itemList: entries.values()) {
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114 if (itemList.size() >= AGGR_THRESHOLD) {
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115 // Now do merging.
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116 // XXX: DEAD CODE // LegendItem item = itemList.get(0);
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117 // Unfortunately we cannot clone and just setDescription, as this
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118 // method was added in JFreeChart 1.0.14 (we are at .13).
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119
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120 // Remove the shapes of all but the first items,
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121 // to prevent "overfill" of legenditemblock.
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122 for (int i = 0, I = itemList.size(); i < I; i++) {
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123 if (i != 0) {
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124 LegendItem litem = itemList.get(i);
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125
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126 // Make shape and line really small.
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127 LegendItem merged = new LegendItem(
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128 "," + litem.getLabel(), litem.getDescription(), litem.getToolTipText(),
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129 litem.getURLText(), false, SPACE,
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
130 false, litem.getFillPaint(), false,
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
131 litem.getOutlinePaint(), litem.getOutlineStroke(), false,
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
132 SPACE, litem.getLineStroke(), litem.getLinePaint());
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
133 newLegend.add(merged);
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
134 }
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
135 else {
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
136 newLegend.add(itemList.get(i));
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
137 }
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
138 }
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
139 }
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
140 else {
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
141 // Do not merge entries.
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
142 for (LegendItem li: itemList) {
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
143 newLegend.add(li);
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
144 }
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
145 }
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
146 }
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
147
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
148 plot.setFixedLegendItems (newLegend);
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
149 }
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
150 }
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
151 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org